Brand: pFlow

pFlow GFR Agricultural LoRaWAN Ultrasonic Flow Meter

Name: pFlow GFR Agricultural LoRaWAN Flow Meter – Datasheet
Brand: pFlow

Description

Overview

The pFlow GFR Agricultural Flow Meter is a clip-on ultrasonic instrument purpose-built for agriculture and irrigation applications, using LoRa communication and the optional LoRaWAN protocol to deliver ultra-remote, low-power, high-availability wireless data transmission. This communication technology transmits information at very low frequencies with low complexity and cost, making the GFR an ideal solution for field installations where running wired communication infrastructure is impractical.

As the official authorized partner and exclusive regional representative for pFlow Gentos, Seven Star LLC proudly supplies the GFR to agricultural cooperatives, irrigation contractors, and farm management operators across the Sultanate of Oman, Muscat, and the wider GCC. Its long transmission distance and no-wiring installation make it especially well suited to the dispersed field layouts typical of large-scale agricultural irrigation networks.

Measurement Principle

The pFlow GFR adopts the ultrasonic transit-time measurement principle, combined with patented flow algorithm technology to achieve accurate measurement of fluid flow in the pipe. The instrument delivers ±2% accuracy (0.3m/s to 5m/s) with 0.4% repeatability across a flow velocity range of 0.03m/s to 5.0m/s, giving irrigation managers dependable data for water allocation decisions.

The product features an all-in-one, clip-on structure design that is simple and convenient to install, requiring only four steps from start to finish. The installation process requires no contact with fluid media and no need to shut down the flow, allowing irrigation systems to remain operational throughout commissioning—a significant advantage during critical growing seasons.

Engineering Design of the pFlow GFR

The pFlow GFR supports LoRa communication with a maximum transmit power of 22dBm, operating reliably across a wide temperature range of -40°C to 85°C to withstand harsh outdoor field conditions. The device offers selectable LoRa frequency bands to match regional requirements, including EU868, US915, CN779, EU433, AU915, CN470, and AS923(HK), ensuring compatibility with LoRaWAN networks deployed across different countries and regions.

A 1.54-inch LCD color screen with 240×240 resolution rotates 360° for clear readings from any mounting angle, paired with three touch keys for straightforward field configuration. Beyond its wireless LoRa capability, the GFR also provides a standard RS485 interface with FUJI or MODBUS protocol support, giving installers flexibility to integrate via either wireless or wired communication depending on site infrastructure.

Key Features

The pFlow GFR combines long-range wireless connectivity with rugged clamp-on sensing for agricultural applications. Core capabilities include:

LoRa and optional LoRaWAN communication for ultra-remote, low-power, low-cost data transmission.
Selectable frequency bands (EU868, US915, CN779, EU433, AU915, CN470, AS923) for regional compatibility.
Easy installation with no pipe damage, no adjustment, and simple clip-on measurement.
360° rotation adjustable LCD color display screen for flexible field-reading angles.
No wiring required for wireless installations, with long transmission distance.
±2% accuracy across a flow velocity range of 0.03m/s to 5.0m/s.
Wide operating temperature range from -40°C to 85°C for demanding outdoor conditions.
Standard RS485 with FUJI or MODBUS protocol as a wired communication alternative.

Industrial Applications

The pFlow GFR is engineered specifically for agriculture and irrigation systems across Oman, where its LoRaWAN wireless capability enables monitoring of dispersed field flow points without running cable infrastructure across large farm areas. Beyond agriculture, the GFR’s long-range wireless design also serves water and wastewater management, HVAC systems, and environmental and carbon footprint monitoring programs.

As the officially authorized partner for pFlow Gentos, Seven Star LLC distributes the GFR to agricultural cooperatives, farm management companies, and rural water authorities throughout the Sohar and Salalah economic zones and the broader GCC region, supporting efficient, connected irrigation water management.

Technical Specifications

Full technical parameters for the pFlow GFR agricultural LoRaWAN ultrasonic flow meter:

Parameter	Specification
Model	pFlow GFR
Measurement Principle	Ultrasonic Transit-Time, Clip-on
Flow Velocity Range	0.03m/s to 5.0m/s
Accuracy	±2% (0.3m/s ~ 5m/s)
Repeatability	0.4%
Pipe Size	DN15, DN20, DN25, DN32
Pipe Material	Stainless Steel, PVC, Copper, PPR
Wireless Communication	LoRa / LoRaWAN, 22dBm Max Transmit Power
Wired Communication	RS485 (FUJI or MODBUS Protocol)
Display	1.54-inch LCD Color Screen, 360° Rotation
Operating Temperature	-40°C to 85°C
Enclosure Rating	IP54

Why Choose Seven Star LLC for LoRaWAN Irrigation Networks

Large farm sites in Oman’s interior often span kilometers between individual flow points, where the choice of LoRa frequency band can determine whether a meter actually reaches the farm’s gateway reliably. Seven Star LLC’s engineers confirm the correct regional frequency band configuration (EU868 being the common choice for GCC deployments) before the GFR ships, and advise on gateway placement to maximize transmission range across dispersed irrigation zones.

As the authorized regional partner for pFlow Gentos, we also help agricultural cooperatives plan mixed wireless-and-wired rollouts, using the GFR’s LoRaWAN capability for remote field points and its RS485 MODBUS interface for meters closer to a wired control room, and can coordinate bulk orders for wilayat-wide irrigation modernization programs across Oman and the wider GCC.

Request a Quote for pFlow GFR Agricultural LoRaWAN Ultrasonic Flow Meter

To submit a formal Request for Quote (RFQ), check current availability and lead time, or request complete technical datasheets for the pFlow GFR Agricultural LoRaWAN Ultrasonic Flow Meter, please contact the official instrumentation division at Seven Star LLC today. As the authorized partner for pFlow Gentos in Oman and the GCC, our engineers are ready to assist with commercial sourcing and long-range wireless irrigation flow metering integration.

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About brand

Clamp-on ultrasonic flow measurement is what pFlow does. The sensors strap to the outside of the pipe and measure liquid flow by transit time, so the line is not cut and nothing touches the fluid. The brand comes from Gentos, an instrument maker focused on ultrasonic flowmeters, flow sensors and heat and cooling energy meters.

Seven Star LLC is the pFlow agency for Oman and the GCC, listing pFlow ultrasonic flowmeters in fixed, portable and LoRaWAN versions, BTU meters and LoRaWAN flow control valves.

pFlow flowmeter families

Most of the listed models are compact clamp-on sensors grouped by pipe size and duty. The GF family (GFCL, GFR, GF-S-CL, GF-SH-CL for hot water and GF-GH-CL for immersion cooling) and the MF micro flowmeters (MFR, MFCL) serve cooling and process loops on small and medium pipes. The MP series are plug-and-play flow sensors, including the MP801 and a LoRaWAN version. The D116-BTU is a wall-mounted ultrasonic BTU meter, the P116 a portable flowmeter for surveys, and the F8 a fixed meter used in aquaculture. Gentos also builds the F3 series clip-on flowmeters, including a panel-mount version. The VC200-R is a LoRaWAN ball valve that works as a flow switch.

Where pFlow meters are used

The manufacturer documents use in liquid cooling for data centers and semiconductor plants, chilled and hot water metering in central air conditioning, water supply networks and irrigation, aquaculture, and utility lines in petrochemical and power plants.

Ordering a pFlow ultrasonic flowmeter: what we need

Clamp-on meters are selected from pipe data. Send the pipe outside diameter, wall thickness and material, any liner, the liquid and its temperature, the expected flow span and the straight pipe length available. Add the output you need (4-20 mA, pulse, Modbus, LoRaWAN) and the supply voltage. For BTU meters include the supply and return temperature span.

Frequently Asked Questions

Why does the pFlow GFR use LoRa communication?

LoRa and optional LoRaWAN protocols enable ultra-remote, low-power, low-cost data transmission, ideal for agricultural irrigation sites spread across large field areas without existing wired infrastructure.

Does the GFR require pipe cutting or a shutdown to install?

No. The GFR uses an all-in-one clip-on design completed in four steps, requiring no contact with fluid media and no need to shut down the flow.

Which LoRa frequency bands does the GFR support?

The GFR supports selectable frequency bands including EU868, US915, CN779, EU433, AU915, CN470, and AS923(HK), matching regional LoRaWAN network requirements.

Can the GFR also be wired instead of wireless?

Yes. In addition to LoRa wireless communication, the GFR provides a standard RS485 interface with FUJI or MODBUS protocol support for wired integration.

Is Seven Star LLC an authorized representative for pFlow products?

Yes. Seven Star LLC is the officially authorized partner and exclusive regional representative for pFlow Gentos in Oman and the GCC, supplying genuine products with local technical support.

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